The island was uninhabited when discovered by the Portuguese in 1502. One of the most isolated islands in the world, it was for centuries an important stopover for ships sailing to Europe from Asia and South Africa. The British also used the island as a place of exile, most notably for Napoleon I, Dinuzulu kaCetshwayo and more than 5,000 Boer prisoners. Saint Helena is Britain's second oldest remaining colony (now termed overseas territory), after Bermuda.